wide-angle lens

Principle: Using an optical glass lens combination, a clear image is formed on the camera sensor or film by refracting light. After the light enters the lens, it is refracted and focused by multiple groups of lenses, and finally an inverted real image is formed on the sensor. The focal length determines the viewing angle and magnification, and the aperture controls the amount of light entering, affecting exposure and depth of field. Category: According to whether the focal length can be adjusted, it is divided into zoom lenses and fixed-focus lenses. The zoom lens has adjustable focal length, which is flexible for multiple scenes, but the optical quality may be slightly inferior. The fixed-focus lens has a fixed focal length, better optical quality, and a larger aperture, which is suitable for high-quality shooting. Buying points:            Look at the focal length The focal length is the distance from the optical center of the lens to the photosensitive element, which determines how far the lens can capture the scene clearly. Common focal length lenses include wide-angle lenses, standard lenses, telephoto lenses, super telephoto lenses, and macro lenses. Wide-angle lens: focal length 18-35mm, wide viewing angle, can capture more scenes. Wide-angle lens is easy to produce an exaggerated effect of perspective, making foreground objects appear larger and background appear farther away. Suitable for landscape photography, architectural photography, interior photography. Standard Lens: Focal length 35-70mm, the viewing angle is close to the viewing angle of the human eye, and the imaging is natural. 50mm lens is called standard lens because it is closest to the viewing angle and perspective effect of the human eye. Suitable for portrait photography, street photography, daily photography. Medium telephoto lens: focal length 70-200mm, narrow viewing angle, good background blur effect, suitable for shooting distant objects and close-ups. Often used in portrait shooting, can compress perspective, make the figure appear more three-dimensional. Suitable for portrait photography, sports photography, wildlife photography. Telephoto lens: focal length > 200mm, very narrow viewing angle, can shoot distant objects. Telephoto lens has a significant compression perspective effect, making distant objects appear closer. Suitable for wildlife photography, sports photography, astrophotography. Super telephoto lens: focal length > 400mm, very narrow viewing angle, can shoot very long-distance objects, usually requires tripod support. Suitable for wildlife photography, astrophotography, aerial photography. Macro lens: A lens specifically designed to capture very close objects, capable of capturing details and tiny objects. Suitable for shooting insects, flowers, jewelry, food, etc.                           Look at the aperture The size of the aperture directly affects the performance of the lens under different lighting conditions and the effect of background blurring (bokeh), usually expressed by the f-value. The smaller the f-value, the larger the aperture, and the more light allowed to enter, the more conducive it is to shooting in low-light environments. Large aperture (f/1.4, f/2.0, f/2.8): allows a lot of light to enter, can shoot in low-light environment, will produce shallow depth of field, the background blur effect is obvious. Suitable for professional portrait photography, wedding photography. Medium aperture (f/4, f/5.6): Balances light volume and depth of field, suitable for a variety of light conditions. Suitable for amateur photographers and travel photographers. Small aperture (f/8, f/11, f/16): will produce a deep depth of field, front and rear scenes are clear, but need more light or slower shutter speed, suitable for landscape photography, architectural photography. Minimal aperture (f/22 or smaller): Provides an extremely deep depth of field, but may cause a degree of diffraction that results in reduced image detail. Perfect for professional landscape photography, experimental or creative photography that requires extreme depth of field.                            Watch autofocus Autofocus means that the camera can automatically adjust the focal length of the lens to make the subject clearly visible, especially when shooting dynamic scenes, moving objects, or rapidly changing scenes. Ultrasonic Motor: Uses ultrasonic vibrations to drive the focusing mechanism, usually very quiet and fast. Suitable for scenes that require fast, quiet focusing, such as wildlife photography, sports photography, and portrait photography. Stepper Motor: Provides smooth and quiet focusing, especially suitable for video shooting. Suitable for video shooting, still life shooting, and slow focusing needs. Linear Motor: Provides very fast and accurate focusing, typically used in high-end lenses. Suitable for professional photography scenarios that require extremely high focusing accuracy and speed, such as sports and wildlife photography. Micromotors: Traditional electric micromotors are usually less expensive, but focus speed and quietness are not as good as modern technology. Suitable for entry-level lenses and users on a budget.

Standard Zoom Lens: Standard zoom lenses usually cover a wider focal length range, such as 24-70mm, and are suitable for shooting various scenes such as daily life, travel, and landscapes. Wide-angle Lens: A wide-angle lens has a wider field of view and is suitable for shooting scenes such as landscapes, buildings, and large groups. It can also be used to create special perspective effects. Portrait Lens: Portrait lenses usually have larger apertures and focal lengths, such as 50mm f/1.8 or 85mm f/1.4. These lenses can produce a shallow depth of field effect, making the subject stand out from the background. fixed focus lens: fixed focus lenses have a fixed focal length, such as 35mm, 50mm, or 85mm. They typically have wide apertures and offer excellent image quality and good low-light performance. Telephoto Lens: A telephoto camera lens has a longer focal length, such as 70-200mm or 100-400mm, and is suitable for shooting distant subjects, such as sports events, wildlife, etc. Macro Lens: Macro lens is specially designed for photographing very small subjects, such as insects, flowers, etc. They offer high magnification and excellent detail capture. Fisheye Lens: Fisheye lens has a large viewing angle and can capture panoramic images or produce strong distortion effects. It is often used for creative photography or specific shooting needs.  

In modern vehicles, Advanced Driver Assistance Systems (ADAS) have become a core component of intelligent driving. These systems rely heavily on cameras to perceive the environment, detect obstacles, and assist drivers in making safer decisions. At the heart of this technology lies a key optical component — the wide-angle lens. Expanding the Field of View for Safer Driving An ADAS camera lens must capture as much of the surrounding environment as possible to detect potential hazards in time. A wide-angle lens allows the camera to cover a broader field of view, minimizing blind spots and improving situational awareness. For instance, in lane departure warning and blind spot detection, a wide-angle automotive lens ensures that vehicles, pedestrians, and road edges are all within the camera’s visual range. This broader coverage gives ADAS systems more data to analyze, helping prevent accidents before they happen. Accurate Image Capture with Low Distortion While wide-angle lenses provide a larger field of view, maintaining low optical distortion is critical for accurate image analysis. Excessive distortion can mislead image processing algorithms and affect object detection performance. High-quality automotive lenses are designed with advanced optical structures and coatings to reduce distortion while preserving image sharpness and contrast. This balance between wide coverage and accurate geometry is essential for reliable ADAS operation. Adapting to Harsh Automotive Environments Cameras used in vehicles must perform reliably in extreme outdoor conditions — from freezing mornings to high-temperature summer days. A professional ADAS camera lens features robust optical materials, anti-fog coatings, and temperature-resistant construction. These lenses maintain stable focus and clarity even under vibration, humidity, and rapid temperature changes, ensuring consistent performance on every drive. Enabling Intelligent Vision Systems In an intelligent driving system, each ADAS camera serves a specific function: front-facing cameras monitor traffic, side-view cameras assist in lane changes, and rear cameras provide parking assistance. Wide-angle lenses play a crucial role in all these applications by enhancing peripheral visibility and supporting real-time image stitching for 360° surround view systems. With advancements in AI recognition and sensor fusion, the demand for high-quality wide-angle automotive lenses continues to grow. They enable the vehicle’s vision system to perceive depth, detect objects more accurately, and operate seamlessly in dynamic traffic environments. The Future of Automotive Vision As the automotive industry moves toward higher levels of automation, ADAS lenses will require even greater precision and environmental adaptability. Future designs will focus on improved light transmission, lower distortion, and better resistance to environmental stress — ensuring safer, smarter, and more reliable driving assistance.